Adjective describing something of high interest/quality or showing extreme satisfaction.
1: "That was a good meal."
2: "Yeah, it was pretty prime."

1: "Want to smoke a blunt?"
2: "Sure, that sounds prime."

References:
Prime time - Is there a better time? I don't think so..
Prime rib - Only the best ribs ever..
Optimus Prime - The boss.
by koven January 7, 2008
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Priming is a school or summer camp prank. It consists of numerous individuals in voice-changer Optimus prime toy helmets(hence the name), (balaclavas and ski masks are used when there are not enough helmets available) and boxers entering a cabin in the middle of the night, turning the lights on, spraying the inhabitants and cranking the cabin heat to the maximum while reciting lines from Transformers, the Michael Bay movie. This is usually a filmed event.
Hey man, have you heard? Our neighbours went priming at 3am last night, and now everyone is soaked wet.
by teh Russian man October 1, 2011
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A word used to describe a moment in time that in indescribably perfect.
This moment is usually one of great joy, happiness and laughter.
Usually a moment experianced around others
Ronald: "OMG.....that chav just tripped over and got mud all over her chavvy clothing."
Barbara: "Dude......that is so prime!"
by HuggyBu September 20, 2009
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The action of stimulation of the sex organs either during masturbation or with a partner, in which one acquires enough stimulation to almost come to orgasm and ejaculates, but instead then backs off in order to prevent ejaculation. After priming a few times and not ejaculating, it then builds up the sexual energy in such a way that it will be a much more powerful orgasm when one does go past the point of no return and has an orgasm. similar to how gunpowder is placed in the pan of a firearm to ignite a charge.
"Dude, have you ever tried priming?"

"I have, and It drives me insane! Sex and no orgasm? It's the biggest tease!"
by TimBeau Sanders March 29, 2013
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A girl who not only is hot but is very sexy and appealing as well.
"Man, Lauren the Bulldogs cheerleader is prime!"
"Shelley's a prime babe!"
by Aussie Ben December 23, 2005
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Having desirable or positive qualities especially those suitable for a specific thing. Said randomly following a specific thing.
Man 1- So you boys going camping this weekend?

Man 2- Yeah! Should be great !

Man 3- It's gona be Prime ! !
by Sam Wilkinson February 15, 2008
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In traditional mathematics, an integer divisible only by 1 and itself.

Known to drive mathematicians mad searching for the next largest one - computers all over the world are continually searching. At the time of writing, the largest prime found was 12978189 digits in length.
1 is prime.
3 is prime.
7 is prime.

A joke in mathematical circles about the properties of induction goes something like:

Base case: 1 is prime
K+1 case: 3 is prime

Therefore all odd numbers are prime. QED

The joke being, of course - that due to faulty logic in the proof, the conclusion is that all odd numbers are prime - a clear fallacy (example: 21... 7*3=21 so 21 is NOT prime).
by ALPSMAC March 2, 2010
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